| [44] | Ibid. p. 244. |
| [45] | Alaska and its Resources, p. 237. |
| [46] | Prehistoric Europe, p. 550. |
| [47] | U.S. Geological Survey, 1872, p. 652. Report of National Museum, 1887, p. 683, Fig. 11535. |
| [48] | Report of National Museum, 1887, p. 678. |
| [49] | Ancient Stone Implements of Great Britain, p. 140. |
| [50] | Vide Prehistoric Man, 3d ed. vol. i. p. 180, Fig. 54. |
| [51] | Report of the Peabody Museum, vol. ii., p. 38. |
| [52] | Primitive Industry, p. 471. |
| [53] | Ibid., p. 542. |